Qur'an 3:171

۞ يَسْتَبْشِرُونَ بِنِعْمَةٍ مِّنَ ٱللَّهِ وَفَضْلٍ وَأَنَّ ٱللَّهَ لَا يُضِيعُ أَجْرَ ٱلْمُؤْمِنِينَ

“They receive good tidings of favor from Allāh and bounty and [of the fact] that Allāh does not allow the reward of believers to be lost -”

Aal-i-Imraan 3:171 · Saheeh International